A rack and pinion locking structure for an isolating switch

Abstract

A rack and pinion locking structure for an isolating switch relates to the technical field of isolating switches and is used to solve the problems of the existing isolating switch locking structure in that the smoothness of the contact surface of the lock plate is difficult to maintain for a long time and the locking mechanism is prone to jamming. It includes a crossbeam, a main knife crank arm, a main knife crank arm bracket, a ground knife crank arm, a ground knife crank arm bracket, a locking disk, a locking gear and a locking rod. The main knife crank arm bracket and the ground knife crank arm bracket are fixed on the crossbeam. One end of the main knife crank arm is rotatably connected to the main knife crank arm bracket, and the other end of the main knife crank arm is connected to the main knife's turntable through the main knife connecting rod. One end of the ground knife crank arm is rotatably connected to the ground knife crank arm bracket, and the other end of the ground knife crank arm is connected to the ground knife; the locking disk is coaxially arranged with one end of the main knife crank arm, the locking gear is coaxially arranged with one end of the ground knife crank arm, the locking rod is slidably arranged on the crossbeam, and the locking rod has a rack portion that meshes with the locking gear. The present invention has low requirements for surface processing angles and is not prone to jamming.

Description

Technical Field

[0001] The invention relates to the technical field of isolating switches, in particular to a gear rack locking structure for an isolating switch. Background Art

[0002] The mechanical lock of the disconnector is generally installed on the main body, and uses the mechanical linkage components of the electrical equipment to form a braking relationship of blocking and locking at a specific position of the mechanical stroke. The locking structure of disconnector products of 220kV and above is mostly push-pull or horizontal blocking type, which is prone to jamming during operation. In addition, the contact area between the lock plates is large during the locking state conversion process, and wind and dust are easily accumulated between the lock plates. Extrusion is easily generated between the locking circular plate and the roller section, and between the locking horizontal plate slot and the rotating shaft, so the smoothness of the contact surface is required to be high. However, the disconnector operates outdoors for a long time, and it is difficult to continuously ensure the smoothness of the contact surface of the disconnector lock plate. The shortcomings of this type of locking structure have always been a common problem in the disconnector industry. Summary of the Invention

[0003] The object of the present invention is to provide an isolating switch gear rack locking structure, which is used to solve the problems of the existing isolating switch locking structure in which the smoothness of the lock plate contact surface is difficult to maintain for a long time and the locking mechanism is prone to jamming.

[0004] The technical solution adopted by the present invention to solve its technical problem is: a gear rack locking structure of an isolating switch, including a crossbeam, a main knife crank arm, a main knife crank arm bracket, a ground knife crank arm, a ground knife crank arm bracket, a locking disk, a locking gear and a locking rod, wherein the main knife crank arm bracket is fixed to one end of the crossbeam, one end of the main knife crank arm is rotatably connected to the main knife crank arm bracket, the other end of the main knife crank arm is connected to the turntable through the main knife connecting rod, the turntable is located below the main knife and is fixedly connected to the main knife through the support insulator, and the ground knife crank arm bracket is fixed to the crossbeam. At the other end of the beam, one end of the ground knife crank arm is rotatably connected to the ground knife crank arm bracket, and the other end of the ground knife crank arm is connected to the ground knife transmission rod through the ground knife connecting rod and the driven crank arm; the locking disk is coaxially arranged with one end of the main knife crank arm, and the outer wall of the locking disk has a locking hole, and the locking gear is coaxially arranged with one end of the ground knife crank arm, and the locking rod is slidably arranged on the cross beam and the sliding direction is along the length direction of the cross beam, one end of the locking rod faces the locking disk, and the other end of the locking rod has a rack portion and the rack portion is meshed with the locking gear.

[0005] Furthermore, a middle portion of the crossbeam is provided with a middle phase bracket, and the locking rod is slidably connected to the middle phase bracket.

[0006] Furthermore, the main knife crank arm bracket, the ground knife crank arm bracket and the middle phase bracket are all "U"-shaped structures.

[0007] Furthermore, a side guide plate is provided in the main knife crank arm bracket, and the locking rod passes through the side guide plate and is slidably connected to the side guide plate.

[0008] Furthermore, a middle guide plate is provided in the middle phase bracket, and the locking rod passes through the middle guide plate and is slidably connected to the middle guide plate.

[0009] Furthermore, a main knife crutch arm shaft is rotatably mounted on the main knife crutch arm bracket, one end of the main knife crutch arm is fixedly connected to the top of the main knife crutch arm shaft, and the locking disk is located on the inner side of the main knife crutch arm bracket and fixedly connected to the middle of the main knife crutch arm shaft.

[0010] Furthermore, a ground cutter arm rotating shaft is rotatably mounted on the ground cutter arm bracket, and the locking gear is located on the inner side of the ground cutter arm bracket and is fixedly connected to the middle part of the ground cutter arm rotating shaft.

[0011] Furthermore, a guide wheel is provided on the inner side of the ground cutter arm bracket, the rack portion is located between the guide wheel and the locking gear, and the rack portion is in contact with the guide wheel.

[0012] Furthermore, an outer wall in the middle of the guide wheel has an annular groove so that the guide wheel is thick at both ends and thin in the middle, and the rack portion passes through the annular groove.

[0013] Furthermore, the three open ends of the ground cutter arm bracket are fixed with sealing plates by bolts.

[0014] The beneficial effects of the present invention are as follows: the present invention drives the axial movement of the locking rod through the locking gear, so that when one end of the locking rod extends into the locking hole on the locking disk, the ground knife is closed and the main knife is locked, and the main knife cannot be closed at this time. When one end of the locking rod is against the outer wall of the locking disk, the movement of the locking rod driven by the locking gear is blocked by the locking disk, and the ground knife is locked, and the ground knife cannot be closed at this time. The locking structure of the present invention has a different working principle from the locking structure in the prior art that mainly uses push-pull or blocking, and does not require high smoothness of the structural contact surface. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is one of the three-dimensional diagrams of the present invention;

[0016] Figure 2 This is the second three-dimensional diagram of the present invention;

[0017] Figure 3 It is a front view of the present invention;

[0018] Figure 4 A top view of the present invention;

[0019] Figure 5 A three-dimensional diagram of a sealing plate installed on a ground cutter arm bracket;

[0020] Figure 6 for Figure 1 A local enlarged view of point A in FIG;

[0021] Figure 7 It is the front view of the guide wheel;

[0022] In the figure: 1 crossbeam, 11 lower splint, 12 upper splint, 13 reinforcing rib, 14 mounting rod, 15 top plate, 16 vertical plate, 17 sleeve, 18 middle phase bracket, 19 middle guide plate, 2 main knife crank arm, 21 main knife crank arm bracket, 22 main knife crank arm rotating shaft, 23 side guide plate, 3 ground knife crank arm bracket, 31 guide wheel, 311 ring groove, 32 sealing plate, 33 ground knife crank arm rotating shaft, 4 locking disk, 41 locking hole, 5 locking rod, 51 rack portion, 6 turntable, 61 side rod, 62 main knife connecting rod, 7 ground knife crank arm, 71 ground knife connecting rod, 72 driven crank arm, 73 rod clamp, 8 locking gear. DETAILED DESCRIPTION

[0023] like Figures 1 to 7 As shown, the gear rack locking structure of the present invention includes a main knife crank arm 2, a main knife crank arm bracket 21, a ground knife crank arm bracket 3, a ground knife crank arm 7, a locking disk 4 and a locking rod 5. The present invention is described in detail below with reference to the accompanying drawings.

[0024] like Figures 1 to 7 As shown, a rack and pinion locking structure for an isolating switch includes a crossbeam 1, a main cutter arm 2, a main cutter arm bracket 21, a ground cutter arm 7, a ground cutter arm bracket 3, a locking plate 4, a locking gear 8 and a locking rod 5. The crossbeam 1 is a square metal tube with mounting mechanisms at both ends. Figure 1The mounting mechanism comprises a lower plate 11, an upper plate 12, a mounting rod 14, and a top plate 15. The lower plate 11 consists of two pieces and is located below the crossbeam 1. The upper plate 12 also consists of two pieces and is located above the crossbeam 1. Both the upper plate 12 and the crossbeam 1 are welded together, as are the lower plate 11 and the crossbeam 1. The lower plate 11 is provided with mounting holes to facilitate insertion of bolts for securing the lower plate to the disconnector. Reinforcing ribs 13 are provided between the upper plate 12 and the crossbeam 1, as well as between the lower plate 11 and the crossbeam 1, to ensure the structural strength of the connection between the crossbeam 1 and the mounting mechanism. A top plate 15 is provided above the upper plate 12. A mounting rod 14 is provided between the top plate 15 and the upper plate 12. The upper end of the mounting rod 14 extends through the top plate 15, while the lower end extends through the upper plate 12. Two sets of nuts are mounted on the upper end of the mounting rod 14, with the top plate 15 positioned between the two sets of nuts. Two sets of nuts are also attached to the lower end of the mounting rod 14, with the upper clamping plate 12 positioned between them. The mounting rod 14 and the nuts securely connect the top plate 15 to the upper clamping plate 12. The top plate 15 is used to mount other components, such as post insulators. An L-shaped vertical plate 16 is fixed to the top plate 15, equipped with a bushing 17 for mounting other components on the disconnector. The mounting mechanism, used to attach the crossbeam 1 to the disconnector body and to mount other components, is conventional.

[0025] like Figures 1 to 3 As shown, the main knife crank arm bracket 21 is a "U"-shaped structure. The main knife crank arm bracket 21 is fixed to one end of the crossbeam 1, and one end of the main knife crank arm 2 is rotatably connected to the main knife crank arm bracket 21 via the main knife crank arm rotating shaft 22. Specifically, the main knife crank arm rotating shaft 22 is rotatably connected to the main knife crank arm bracket 21, and one end of the main knife crank arm is fixedly connected to the top of the main knife crank arm rotating shaft. The other end of the main knife crank arm 2 is connected to the turntable 6 via the main knife connecting rod 62. The turntable is located below the main knife and is fixedly connected to the main knife via a support insulator. The ground knife crank arm bracket 3 is a "U"-shaped structure. The ground knife crank arm bracket 3 is fixed to the other end of the crossbeam 1. One end of the ground knife crank arm 7 is rotatably connected to the ground knife crank arm bracket 3 via the ground knife crank arm rotating shaft 33. The other end of the ground knife crank arm 7 is connected to the ground knife transmission rod via the ground knife connecting rod 71 and the driven crank arm 72. Specifically, the ground cutter arm shaft 33 is rotatably connected to the ground cutter arm bracket 3, and one end of the ground cutter arm 7 is fixedly connected to the top of the ground cutter arm shaft 33. The other end of the ground cutter arm 7 is hingedly connected to one end of the ground cutter connecting rod 71, and the other end of the ground cutter connecting rod 71 is hingedly connected to one end of the driven arm 72. The other end of the driven arm 72 has a rod clamp 73 for clamping the ground cutter transmission rod. The ground cutter transmission rod is conventional and drives the ground cutter to close or open when the ground cutter transmission rod is actuated.

[0026] like Figures 1 to 4As shown, the locking disk 4 is a square structure, and the two adjacent side walls of the locking disk 4 are connected by a transition arc surface. The locking disk 4 is located on the inner side of the main knife crank arm bracket 21, and is coaxially arranged with one end of the main knife crank arm 2, that is, it is fixedly connected to the middle of the main knife crank arm rotating shaft 22. A locking hole 41 is provided on one of the arc surfaces of the locking disk 4. The locking gear 8 is located on the inner side of the ground knife crank arm bracket 3, and the locking gear 8 is fixedly connected to the middle of the ground knife crank arm rotating shaft 33, and then the locking gear 8 is coaxially arranged with one end of the ground knife crank arm 7. The locking rod 5 is slidably set on the crossbeam 1 and the sliding direction is along the length direction of the crossbeam 1. Specifically: the middle part of the crossbeam 1 has a middle phase bracket 18, and the middle phase bracket 18 is a "U"-shaped structure. The middle phase bracket 18 is between the main knife crank arm bracket 21 and the ground knife crank arm bracket 3. The middle phase bracket 18 has a middle guide plate 19, and the locking rod 5 passes through the middle guide plate 19 and is slidably connected to the middle guide plate 19. The main knife crank arm bracket 21 has a side guide plate 23, and one end of the locking rod 5 passes through the side guide plate 23 and is slidably connected to the side guide plate 23. One end of the locking rod 5 faces the locking disk 4, and the other end of the locking rod 5 has a rack portion 51, and the rack portion 51 is engaged with the locking gear 8. When the ground knife crank arm 7 rotates around the ground knife crank arm shaft 33, it drives the rotation of the locking gear 8, and then drives the rack portion 51 and the locking rod 5 along its own axial movement, so that the locking rod 5 moves toward the side where the locking disk 4 is located or moves away from the side where the locking disk 4 is located. When the locking rod 5 moves toward the side where the locking disk 4 is located, the ground knife is closed. When the locking rod 5 moves away from the side where the locking disk 4 is located, the ground knife is opened.

[0027] To guide the movement of the locking rod 5, as Figure 1 、 Figure 6 As shown, the inner side of the ground cutter arm bracket 3 has a guide wheel 31, the rack portion 51 is located between the guide wheel 31 and the locking gear 8, and the rack portion 51 is in contact with the guide wheel 31. Figure 6 As shown, more specifically, an outer wall of the middle portion of the guide wheel 31 has an annular groove 311 , so that the guide wheel 31 is thick at both ends and thin in the middle, and the rack portion 51 passes through the annular groove 311 .

[0028] In order to protect the meshing position of the locking gear 8 and the rack portion 51 and prevent the wind and sand from entering the ground cutter arm bracket 3 and causing the meshing position of the locking gear 8 and the rack portion 51 to be stuck, Figure 5 As shown, the three open ends of the ground cutter arm bracket 3 are fixed with sealing plates 32 by bolts. The setting of the sealing plate 32 surrounds the locking gear 8.

[0029] The working principle of the present invention is described below:

[0030] (1) When the main switch arm 2 is in the open position and the ground switch arm 7 is in the open position, close the ground switch:

[0031] Drive the ground knife crank arm shaft 33 to rotate, so that the ground knife crank arm 7 rotates, and then drives the rack part 51 at the other end of the locking rod 5 to move through the locking gear 8, so that one end of the locking rod 5 moves toward the side where the locking disk 4 is located; during the ground knife closing process, one end of the locking rod 5 extends into the locking hole 41 on the side wall of the locking disk 4. At this time, the main knife crank arm shaft 22 cannot rotate, and thus the main knife cannot be driven to close through the main knife crank arm 2.

[0032] (2) When the main knife arm 2 is in the closing position and the ground knife arm 7 is in the opening position, the main knife is opened:

[0033] Drive the main knife crank arm shaft 22 to rotate, and drive the turntable 6 to rotate through the main knife crank arm 2 and the main knife connecting rod 62, thereby realizing the main knife closing; at this time, the locking disk 4 rotates 180 degrees with the main knife crank arm 2, and the outer wall of the locking disk 4 on the opposite side of the locking hole 41 contacts one end of the locking rod 5. At this time, if the ground knife crank arm shaft 33 is driven to rotate, it is blocked by the locking disk 4, and the locking rod 5 cannot move to the side where the locking disk 4 is located. At this time, the ground knife crank arm shaft 33 cannot rotate, and thus the ground knife cannot be driven to close through the ground knife crank arm 7.

[0034] The present invention uses a locking gear to drive the axial movement of the locking rod, so that when one end of the locking rod extends into the locking hole on the locking disk, the ground knife is closed and the main knife is locked, making it impossible to close the main knife. When one end of the locking rod presses against the outer wall of the locking disk, the movement of the locking rod driven by the locking gear is blocked by the locking disk, locking the ground knife, making it impossible to close the ground knife. The locking structure of the present invention differs from the working principle of the locking structure in the prior art, which mainly relies on push-pull or blocking, and does not require high smoothness of the structural contact surface.

Claims

1. A rack and pinion locking structure for an isolating switch, characterized in that: The locking plate is coaxially arranged with one end of the main knife crank arm, and the outer wall of the locking plate has a locking hole, and the locking gear is coaxially arranged with one end of the ground knife crank arm, and the locking rod is slidably arranged on the crossbeam and slides The moving direction is along the length direction of the crossbeam, and one end of the locking rod faces the locking disk, and the other end of the locking rod has a rack portion and the rack portion is meshed with the locking gear; the main knife crutch arm rotating shaft is rotatably installed on the main knife crutch arm bracket, and one end of the main knife crutch arm is fixedly connected to the top of the main knife crutch arm rotating shaft, and the locking disk is located on the inner side of the main knife crutch arm bracket and fixedly connected to the middle of the main knife crutch arm rotating shaft; the ground knife crutch arm rotating shaft is rotatably installed on the ground knife crutch arm bracket, and the locking gear is located inside the ground knife crutch arm bracket and fixedly connected to the middle of the ground knife crutch arm rotating shaft; the inside of the ground knife crutch arm bracket has a guide wheel, and the rack portion is located between the guide wheel and the locking gear, and the rack portion contacts the guide wheel; the outer wall of the middle of the guide wheel has an annular groove so that the guide wheel is thick at both ends and thin in the middle, and the rack portion passes through the annular groove.

2. The rack and pinion locking structure of an isolating switch according to claim 1, characterized in that: A middle phase bracket is provided in the middle of the crossbeam, and the locking rod is slidably connected to the middle phase bracket.

3. The rack and pinion locking structure of an isolating switch according to claim 2, characterized in that: The main knife crank arm bracket, the ground knife crank arm bracket and the middle phase bracket are all "U"-shaped structures.

4. The rack and pinion locking structure of an isolating switch according to claim 3, characterized in that: A side guide plate is provided in the main knife crutch arm bracket, and the locking rod passes through the side guide plate and is slidably connected to the side guide plate.

5. The rack and pinion locking structure of an isolating switch according to claim 3, characterized in that: A middle guide plate is provided in the middle phase bracket, and the locking rod passes through the middle guide plate and is slidably connected to the middle guide plate.

6. The rack and pinion locking structure of an isolating switch according to claim 3, characterized in that: The three open ends of the ground cutter arm bracket are fixed with sealing plates by bolts.

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